MuPDF

a lightweight PDF and XPS viewer

The renderer in MuPDF is tailored for high quality anti-aliased graphics. It
renders text with metrics and spacing accurate to within fractions of a pixel
for the highest fidelity in reproducing the look of a printed page on screen.

MuPDF is also small, fast, and yet complete. It supports PDF 1.7 with
transparency, encryption, hyperlinks, annotations, searching and more.
It also reads XPS and OpenXPS documents.
MuPDF is written modularly, so features can be added on by integrators if
they so desire.

Since the 1.2 release of MuPDF, we have optional support for interactive
features such as form filling, javascript and transitions.

License

MuPDF is free software: you can redistribute it and/or modify
it under the terms of the
Affero GNU General Public License
as published by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.